单项选择题

There are many kinds of steel, each ______ its special use in industry.

A. having
B. will have
C. has
D. is having
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Under the ______ that we needed money badly, we had to accept a very low price when we sold the house.A. circumstancesB. occasions C. conditions D. situations
单项选择题
By the end of this month he ______ this painting.
A. will be finishing
B. will finish
C. is finishing
D. will have finished
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